On 07/30/2013 10:05 PM, mohan.radhakrish...@polarisft.com wrote:
Hi,
I am creating a list of 2 lists, one containing filenames
and the other file descriptors. When I retrieve them I am unable to close
the file descriptor.
I am getting this error when I try to call close(filedescriptors
[[2]][[1]]).
Error in UseMethod("close") :
no applicable method for 'close' applied to an object of class "c
('integer', 'numeric')"
print(filedescriptors[[2]][[1]]) seems to be printing individual elements.
Thanks,
Mohan
filelist.array<- function(n){
cpufile<- list()
cpufiledescriptors<- list()
length(cpufile)<- n
for (i in 1:n) {
cpufile[[i]]<- paste("output", i, ".txt", sep = "")
cpufiledescriptors[[i]]<-file( cpufile[[i]], "a" )
}
listoffiles<- list(cpufile=cpufile,
cpufiledescriptors=cpufiledescriptors)
return (listoffiles)
}
#Test function
test.filelist.array<- function() {
filedescriptors<- filelist.array(3)
print(filedescriptors[[2]][[1]])
print(filedescriptors[[2]][[2]])
print(filedescriptors[[2]][[3]])
}
Hi Mohan,
When you have opened connections as above, you need to pass the
connection, not just one element, to "close":
close(listoffiles$cpufiledescriptors[[1]])
Jim
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
